Interview Questions: Facebook Groups

Why does this product exist?

How would we set goals for this product?

What would be our success metrics?

1. Assumptions

There are no events in groups

Just normal messaging and posts but in groups

Can have admin privileges

2. Product Rationale

Company Mission: Build the future of human connection and the technology that makes it possible

Why does this exist? While News Feed supports broadcast and discovery, Groups enable deeper engagement and belonging, often in smaller or more private spaces. This aligns with Meta’s broader mission

  • Groups serve purposes ranging from:
    • Support (e.g., parenting, mental health)
    • Learning (e.g., hobbyist communities, professional development)
    • Local coordination (e.g., neighborhood groups)
    • Passion-based connection (e.g., fans, alumni)

Weaknesses/Threats

  • Could cannibalize other products at Meta
  • Could create exclusivity of friends or lead people to engage with less of their friends
    • People without any groups to join might feel left out

Product lifecycle stage: early adoption and growth

Product Mission: Help people form deeper relationships through group

3. Entities

Users

  • Group Admin - power users who create and manage groups
  • Engaged members - actively contribute
  • Passive members - consume content but don't engage
  • Potential members - FB users not yet in a specific group

Groups

Advertisers

Meta

Customer journey

  • Create group
  • Discovery
    • Invite others to group
    • Search for group
  • Join
  • Engage
  • Admin group

4. Objectives

1. Create long lasting groups and group engagement so that people can create and build better relationships

2. Help people create and find groups that are related to their interests and needs

Others

  • Ensure safe, well-moderated environments
  • Grow the number of active communities
  • Expand reach to underserved user segments

5. Potential Metrics

Joint

  • Total # hours spent in groups
  • DAUs in groups
  • # of searches for groups

Groups

  • # of Daily Active Groups
  • # of new groups created
  • CTR of group impressions in feed/search
  • # of invitations sent

Monetization: too early to focus on monetization

  • ARPU
  • # of advertisers on platform

6. North Star Metric

Total # hours spent in groups

  • Better than action engagement metrics because many people in groups will be passive members and won't engage

7. Leading indicators / Secondary Success Metrics

# of Daily Active Groups: make sure that there are lots of active groups for people to join

  • # of new groups created
  • # of invitations sent

DAUs in groups: want people to find at least one group to join; could also look at DAUs in 2+, 3+ groups,…

8. Health / Guardrail Metrics

Group health

  • Group retention rate: groups remain healthy
  • 1 month retention rate after join: want to make sure groups aren't click bait

Targeting health

  • CTR of group impressions in feed/search: want to make sure we aren’t spamming users to get them to join groups
  • Invitation acceptance rate: avoid spamming

Total # hours spent on other meta products: doesn’t cannibalize

9. Tradeoff questions

North star going up but # of new groups created per month is going down? How will you assess the situation?

  • Pro’s
    • People are using groups more actively
  • Con’s
    • Might indicate the product growth will slow down in the future or that the breadth and depth of groups available will decrease
  • Hypotheses
    • Might mean people are already in groups or have already created enough groups
    • Maybe people aren’t finding people to fill in groups
    • Might need to increase awareness

Engagement in groups going up but marketplace engagement going down and this causal not correlated. Is this ok?

  • This likely means that people are using groups to buy/sell products instead of marketplace. This is concerning because it might mean marketplace is not trusted or not meeting their needs.

Come up with 1-3 features. How would you measure success?

  • Personalized group suggestions: CTR, 1 month retention
  • Slack threads in messaging: total hours spent in groups; % of posts that use feature
  • Group clone: can clone groups and quickly remove - hours, DAGs